Dwain Chambers is expecting to hear today whether his foray into rugby league will extend beyond the end of his four-week trial at Castleford Tigers. The sprinter played 39 minutes of a specially arranged reserve-team friendly against York last month, and the Tigers are in the process of deciding whether to offer him a longer deal.

Castleford are understood to have approached potential sponsors about financing a new deal for Chambers, though a final decision on his future has yet to be made. Should Chambers leave the Tigers, several rival clubs are thought to be considering a move for the 30-year-old, such has been the public interest generated by his experimental month in rugby league.

More than 3,000 supporters attended his reserve-team debut, when he played in four spells as a substitute before retiring near the end with a shoulder injury. Chambers later stressed that he had enjoyed the experience and an extended spell in rugby league remains a possibility despite the fact that he has not yet ruled out an attempt to overturn the British Olympic Association's ban on him competing in Beijing later this year.

Chambers' solicitor, Nick Collins, did not return the Guardian's call yesterday but told the Rugby League Express newspaper that they are waiting for an offer from Castleford to be forthcoming. Chambers' initial four-week spell at the Jungle was unpaid but was arranged with the possibility of signing a permanent £60,000-a-year contract. An announcement is expected to be made by the club either today or tomorrow.

The Rugby Football League is in talks with Murrayfield officials over the possibility of switching their annual on-the-road "Magic" weekend to Edinburgh next year. Having held the event at Cardiff's Millennium Stadium for the last two seasons, the governing body is now considering taking the weekend to Scotland in 2009.

This year's event, which sees all six Super League fixtures taken to one venue, attracted an aggregate crowd of 63,144 over the two days, an increase of 4,313 on 2007. But the RFL is privately disappointed with the stadium company's lack of promotion for the weekend. "A number of cities are interested in holding the Magic weekend next year because of the economic benefits that this event can bring," said the RFL communications manager, Craig Spence.